Insertable fire brick



April -5, 1927.

T. E. M CAIG INSERTABLE FIRE BRICK Filed June 21. 19 26 2 Sheets-Sheet '1 1,6233 2 April 1927' T. E. M CAIG 3 INSER'IABLEv FIRE BRICK Filed June 21. 1926 2 Sheets-Sheet [:zvezzir 2% 077255257 F6245 Patented Apr. 5, 1927.

f outrun srArEs THOMAS E. MGCAIG, OF CHICAGO, ILLINOIS.

Y INSERTABLE FIRE BRICK.

Application filed June 21, 1926. Serial no. 117,444.

This invention relates to insertable fire brick for use in furnaces and the like. The primary object of this invention is to provide a fire brick and a support for the same which is so arranger l that one or more fire bricks may be removed from a furnace and one of these insertable firejbricks inserted in its place and firmly fastened thererin without disturbing the surrounding brick work. v

Another object is to simplify the construction of this fire brick and its supportingmembers so that both can be readily and economically manufactured and installed. These and other objects as will hereinafter appear are accomplished by this invention and are shown in the accompanying drawings, in which:

Figure 1 is a longitudinal section through the roof of a furnace embodying the invention; y I

Fig. 2 is a top plan view of the supporting bars showing the supporting yokes in cross section;

Figs. 3 and 1 are transverse vertical sections on the lines 3 and 1 respectively of Fig. 1;

Fig. 5 is a top plan view of the supporting channels of Fig. 3;

Fig, 6 is a top plan view of the arch on the broken line 66; and

Fig. 7 is a top plan view of a single rectangular fire brick. V

The embodiment illustrated comprises a straight substantially horizontal section of a furnace roof having a series of rows or rectangular brick 10, each brick being suspended, as will later be described, by means of a hanger 11 from a supporting bar 12 which in turn is carried by means of supporting yokes 13, 14 and 15 from supporting channels 16, 17 and 18 respectively.

Each fire bricklO is provided with a centrally disposed slot 10 on its upper sur face which terminate in a shouldered groove 10? which is adapted to receive the rounded head 11 of the hanger 11. This hanger can he slid into the groove from the side and when at the end of the slot 10 is at the approximate center of the fire brick at the hanger head 11*.

The lower face of the head 11 is provided with a slot 11 so that a large screw driver or a small fiat bar (not shown) may be inserted through the hole 10 for turning the hanger.

To insert a fire brick of this kind in a wall, the operator inserts the hanger 11 into the fire brick 10 and turns the hanger so that the T-shaped head 11 is parallel to the slot 12. in the supporting bar 12; The fire brick with its hanger thus in place is buttered with a mixture of water and fire clay or the like and is then pushed up-into place, the T-shaped head 11 of the hanger passing through the slot 12 in the supporting bar, the fire brick-being forced somewhat above its normal position so as to permit the hanger 11 to be turned so as to. place the T-shaped head 11 at right angles to the slot 12 as shown in Fig. 4 which is accomplished by turning the hanger by means of the screw driver or other flat tool inserted through the opening 10 into the slot 11".

When the hanger is so turned the brick is permitted to drop back until it hangs upon The hole 10 is then secured with any suitable fire-proofing material 10 such as a mixture of broken fire bricks, fire clay and water or the like, which is commonly called ganister.

On the arches is shown a series of wedge shaped bricks 10. Other forms of the brick will also readily suggest themselves to one conversant in this art, the two forms shown here being onlyillustrative of what can be done with this invention.

Thus it will be seen that the applicant has provided a convenient and practical method of inserting a single brick in a fire proof furnace wall or root without having to disturb the surrounding brick work, whereas heretofore it has been necessary to tear out either a whole line of brick work or to make the replacements from the outside o. the wall or roof because of the metho s used in supporting these fire bricks.-

Figure 1 shows only a single longitudinal" row of fire brick and the supports for the same whereas, Figs. 3,4 and 5 show the methods of supporting adjacent parallel rows.

While I have shown and described but a single embodiment of this invention, it is to be understood that it is capable of many modifications. Changes therefore in the construction and arrangement may be made which do notdepart from the spirit and scope of the invention as disclosed in the appended claims.

I claim:

1. A fire brick having a substantially central hole therethrough, a slot extending may he slid into said slot and turned by a tool inserted through said hole.

2. A fire brick having a substantially central hole therethrough, a slot extending into said hole from one side, and a ledge at each side of said slot adapted to receive the head of a hanger, whereby said hanger may he slid into said slot and turned by a tool inserted through said hole.

THOMAS E. MCCAIG. 

